Q. 165.0( 1 Vote )

Mark the correct alternative in the following:

If A and B are two disjoint sets, then n is equal to

A. n(A) + n(B)

B. n(A) + n(B) n

C. n(A) + n(B) + n

D. n(A) n(B)

Answer :

Here, A and B are two disjoint sets.


AB=ϕ


n(AB)=0


n(AB)=n(A)+n(B)-n(AB)


=n(A)+n(B)-0


=n(A)+n(B)

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